Wrench.



I B. F. WOODWARD.

WRENCH.

APPLICATION FILED MAR. 15. 1915.

1,285,541. Patented Nov. 19, 1918;

Slavonic;

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BENJAMIN" F. WOODWARD, or monnr'r, MISSOURI, AssIGNoR or ONE-HALF TO WILLIAM E. BELL, 0F MONE'IT, MISSOURI.

WRENCH.

Specification of Letters I atent. Patented NOV. 19,1918.

Application filed March 15, 1918. Serial No. 222,624. I

To all whom it 'nmj/ co'nvewa,

Be it known that I, BENJAMIN F. WOOD-- WARD, a citizen of the United States, residing at Monett, in the county of Barry and State of Missouri, have invented a new and useful Wrench, of which the following is a specification.

The subject of this invention is a wrench, and the invention contemplates an improvement in the wrench set forth in Letters Patent Number 788,388, issued April 25, 1905.

The invention further contemplates providing means for clamping the jaws firmly together.

A still further object of the invention is the provision of means for quickly separating the jaws.

The invention further contemplates the production of a simple, durable and eflicient wrench.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed without departing from the spirit of the invention.

A practical embodiment of the invention is shown in the accompanying drawing, wherein Figure 1 is a perspective view of a wrench constructed in accordance with the invention;

Fig. 2 is a central longitudinal section of the same;

Fig. 3 is a sectional view taken on the line 3-3 of Fig. 2.

Referring to the drawing by numerals of reference In carrying out the invention a handle 1 is provided which merges at one end into a jaw 2 and which has formed on a portion of its upper face a rack 3. A yoke 4 straddles the forward end of the handle 1 to which it is secured by rivets or otherwise and from which it rises. The cross bar of the yoke 4c is apertured to receive a thumb screw 5 which is threaded into the aperture. The handle 1 is provided at its forward or jaw end with a recess extending downwardly from the upper face of the handle and in this recess works a headed pin 6 which is surrounded by a compression spring 7.

A movable jaw 8 is adapted to cooperate with the aw 2 and this jaw is formed with an angularly disposed arm 9 which overlies the handle 1 and is slidable through the yoke 1. A yoke 10 is secured to the rear end of the arm 9, from which it depends, and this yoke embraces the handle 1 with a'close sliding fit. The arm 9 has formed transversely of its lower face, and in that portion of the arm embraced by the yoke 10, a groove 11 which receives and forms a bearing for the substantially cylindrical head of a dog 12 which is adapted to engage the teeth of the rack 3.

The jaws 2 and 8 are provided with similar transverse dovetail grooves 13 which are adapted to receive dovetail ribs formed transversely of jaw plates 14, thus detachably securing plates to the jaws.

In practice the device operates in the following manner The rear end of the arm 9 is depressed causing the pawl 12 to release from the teeth, and the jaw 8 and its arm 9 are slid back and forth to accommodate the work. When the jaws are brought against the work, the thumb screw 5 may be threaded inwardly to bring the forward end of the arm 9 closer to the handle 1 and cause the jaws to contact more closely and grip more firmly the work.

When the wrench is to be removed, the thumb screw 5 is threaded outwardly and the pin 6, under the force of the compres sion spring 7, will thrust outwardly against the arm 9 and tend to separate the parts and release the jaws.

Having thus described the invention, what is claimed as new and sought by Letters Patent, is

1. A wrench, including a handle having a stationary jaw, a rack formed on the handle, a yoke secured to the handle, a movable jaw having an arm slidable through the yoke, a yoke secured to the arm and encircling the handle, a pawl on the arm and engageable with the rack, a resiliently actuated member between the handle and arm for forcing the handle and arm apart, and means in the first mentioned yoke for forcing the arm toward the handle.

dle'provided with a recess, a pin slidable in the recess, a compression spring surrounding the pin and forcing the pin against the arm to separate the arm and handle, and 10 means carried by the first mentioned yoke for forcing the arm toward the handle.

In testimony that I claim the foregoing as my own, I have hereto afiixed my signature in the presence of a witness.

BENJAMIN F. WOODWARD.

Witness:

W. T. DAVIS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of I'atents,

Washington, D. G. r I 

